........................pilots of radio equipped aircraft will be required to make the radio calls that are necessary for safety purposes when operating at or in the vicinity of a non-controlled aerodrome.
In bold (showed by me) will be the area that CASA I reckon won't be able to prove too easily.
A defendant could argue, 'what's necessary'? I at the time didn't consider further R/T calls to a particular AD necessary yr honour, I was busy handling an emergency etc. The courts would be backed up more than a politicians septic system!
The new rules won't work, I know that, Dick you know that & just about every current flying pilot will know that. And who pilots A/C that will be effected anyway? WE do, not CASA, they ain't got a clue!
As another has said, aviate navigate communicate in that order.
CW.